Hello,

I do not have any front lip at my Prelude at the moment. And the only reason I'd consider one would be some airdynamics effect. I mean some front downforce.

Is there any reliable information on this?

 

trust me, it isn't going to matter

you aren't doing 150 mph constantly

and what do you need downforce for? track/road racing? there are numerouos other things you need to improve before you are worrying about areodynamics

 

what year is your prelude? proven airodynamics are hard to come by and are usually more expensive than normal lips made just for looks.
if you have a 4th gen (1993-1996) i would suggest putting on the 94-95 type r accord, or kamanari lip kits.
accord type r:
https://honda-tech.com/zerothread?id=641555
third down the page
kamanari:
http://www.kaminari.com/products/92Prelude.htm

if 5th gen (1997-2001) then the factory, or mugen lip kits would be a good way to go.
OEM lip kit:
http://images.google.com/imgre...a%3DN
mugen:
http://images.google.com/imgre...a%3DN
sry for the sucky pics.
as peturn said, unless your trying to break speed records you dont need to worry too much about aerodynamics. try improving more important things first.

 

I need that for autox. You do not have to go 150mph for airdynamics to play some role.

 

really? well to a certain extinct you are right, there are classes in auto-x where they have huge wings to get grip........

you aren't in this class and your option isn't going to make a difference. most auto-x/road racing ppl will tell you that aerodynamics are the last thing to worry about on a race car (other than the obvious)

what will make a difference is driving ability, suspension, weight saving, power. after you have mastered all that, you might want to look into aerodynamics

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by helicopter201 &raquo;</TD></TR><TR><TD CLASS="quote">what year is your prelude? proven airodynamics are hard to come by and are usually more expensive than normal lips made just for looks.
if you have a 4th gen (1993-1996) i would suggest putting on the 94-95 type r accord, or kamanari lip kits.
accord type r:
https://honda-tech.com/zerothread?id=641555
third down the page
kamanari:
http://www.kaminari.com/products/92Prelude.htm

if 5th gen (1997-2001) then the factory, or mugen lip kits would be a good way to go.
OEM lip kit:
http://images.google.com/imgre...a%3DN
mugen:
http://images.google.com/imgre...a%3DN
sry for the sucky pics.
as peturn said, unless your trying to break speed records you dont need to worry too much about aerodynamics. try improving more important things first.</TD></TR></TABLE>

Those are the Mugen rears on that OEM picture.

 

petern101, trust me, I khow all that.

But the question that started the topic was not about that. I am curious if this element is actually doing any significant airdynamics job, or is primarily for looks.

 

most lips made 99% of the time can be said that they are just for looks.

if you want some sort of aerodynamic effect(ie more downforce), make a front splitter out of wood

 

the lip itself isn't making any difference at auto-x speeds (or even at track speeds.)

and to have a splitter work at auto-x speeds it'd need to be huge to generate enough downforce to matter unless your course designer likes to put in 60 mph sweepers into every course.

i wouldn't worry about aero at a/x...

 

well if you knew all that i would think you could deduce a piece of plastic like the one in front of the prelude does nothing for your car.

the shape is basically an extention of the prelude body, isn't even close to the floor, real kits don't even do much if any at all.

 

Ya Mugens are aero, OEM is aero, Greddy not sure, VIS no way, and WWRS no way.

 

i think that unless you are going for the land speed record you shouldnt really have to worry too much about aerodynamics anyway.

oh yeah and personally i think that they are mainly for looks!!

i have the GReddy lip on my 98 and i bought it because it looks nice!!

 

this rx7 shoulve spent more time at the aero shop...he hit 215mph...WAS aiming for 300 hehehe

http://videos.streetfire.net/s...F.htm

moral is...preludes are heavier than rx7's and unless you plan to break his record...thing that you could do is bolt some plating to the undercarriage of your car (underbody diffuser) so the wind does'nt rip up into the engine bay/exhaust piping. thats what they do with the v-spec skyline. (about halfway down the page donnas r34 under body) lucky chicks with u.s legal skyline...

http://www.speedyzx.com/Funrun110604/run.html


Modified by helicopter201 at 4:36 PM 5/1/2006

 

The only thing a lip will do is divert air from going under your car to a certain degree. It may help a little with gas mileage, but you will not stick to the road any better, even at high speeds.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accel &raquo;</TD></TR><TR><TD CLASS="quote">the only reason I'd consider one would be some airdynamics effect. </TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accel &raquo;</TD></TR><TR><TD CLASS="quote">petern101, trust me, I khow all that.I am curious if this element is actually doing any significant airdynamics job, or is primarily for looks.</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accel &raquo;</TD></TR><TR><TD CLASS="quote">I need that for autox. You do not have to go 150mph for airdynamics to play some role.</TD></TR></TABLE>

nor do you have to spell it correctly for it to matter...


If you really want more grip in the front, then a commercial lip (like those mentioned earlier) isn't going to do much to be worth the money spent.

Lip spoilers are typically for either style or air deflection, occasionally for downforce. To get any kind of truly beneficial downforce effects, you would need a lip that looks something like this:



and even that's a little iffy.

ultimately, the speeds at which you're going during an autocross will never be high enough for a lip like that to play anything more than a psychosomatic role in front end grip. you would be better getting any one of the following:

1.) lighter wheels
2.) stickier tires
3.) a better suspension
4.) track driving school

even a half-assed underbody diffuser would play a better role than (e.g.) an Accord Type-R front lip

 

Ok, guys, everybody has an opinion, but I'd rather preffer some source of information on this.

Here's a photo from some russian auto magazine, speed is 144km/h ~ 90mph (petern101, it's not 150mph right?). Car is the same, the difference is the bodykit, maybe some lowering.

http://www.autoreview.ru/new_s...a.jpg

Here's another one, featuring European version of Mitsu with and without OEM bodykit, speed is the same. I understand that Russian is not the language most of you'd understand, but just pictures tell enough.

http://www.autoreview.ru/new_s...a.htm

Has anybody seen anything like this on Preludes?

 

front downforce isn't coming from a front lip, it'd be coming from a splitter and airdam.

the splitter is the bottom-most element and extends forward from the airdam in these pics:





these splitters would possibly be bigger if the rules allowed.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accel &raquo;</TD></TR><TR><TD CLASS="quote">Ok, guys, everybody has an opinion, but I'd rather preffer some source of information on this.

Here's a photo from some russian auto magazine, speed is 144km/h ~ 90mph (petern101, it's not 150mph right?). Car is the same, the difference is the bodykit, maybe some lowering.

http://www.autoreview.ru/new_s...a.jpg

Here's another one, featuring European version of Mitsu with and without OEM bodykit, speed is the same. I understand that Russian is not the language most of you'd understand, but just pictures tell enough.

http://www.autoreview.ru/new_s...a.htm

Has anybody seen anything like this on Preludes?</TD></TR></TABLE>

yeah pictures with arrows and some numbers with a language i can't understand

ooor you could go to almost every auto-x in america and ask ppl if that lip will do you good rather than all the other stuff i mentioned.....

do you know if that sedan has aerodynamic lift? the c5 corvette had lift. and i would like to see you hit 90mph on a auto-x course with a prelude (unless you are heavily modified)

yeah we all have opinions and you were asking for our opinions, we gave it to you and you still want to defend your choice...........why make the thread in the first place??? is it because you thought everyone would just solidify your opinion but when you see that everyone else is disagreeing you immediatly get defensive????

if it was possible i would tell you to get whatever lip (custom or bought) you want. i will completely remove my front bumper. and we can auto-x/road race/drag race all day

i bet you you won't see a difference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bad-monkey &raquo;</TD></TR><TR><TD CLASS="quote">front downforce isn't coming from a front lip, it'd be coming from a splitter and airdam.

the splitter is the bottom-most element and extends forward from the airdam in these pics:
x
x
x

these splitters would possibly be bigger if the rules allowed.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95greenlude &raquo;</TD></TR><TR><TD CLASS="quote">most lips made 99% of the time can be said that they are just for looks.

if you want some sort of aerodynamic effect(ie more downforce), make a front splitter out of wood</TD></TR></TABLE>

TY

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by petern101 &raquo;</TD></TR><TR><TD CLASS="quote">
yeah pictures with arrows and some numbers with a language i can't understand
</TD></TR></TABLE>

It is never too late to learn

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by petern101 &raquo;</TD></TR><TR><TD CLASS="quote">
yeah we all have opinions and you were asking for our opinions, we gave it to you and you still want to defend your choice...........
</TD></TR></TABLE>

Opinions in this thread are highly predictable. I was asking for any relaible source of information. Something like articles I sampled. Those guys write interesting reviews. Theres an article with airdynamic charts of S2k versus TT versus BMW M Coupe, but no luck with Preludes

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bad-monkey &raquo;</TD></TR><TR><TD CLASS="quote">front downforce isn't coming from a front lip, it'd be coming from a splitter and airdam.</TD></TR></TABLE>

Thanks! I'll have to look at this.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bad-monkey &raquo;</TD></TR><TR><TD CLASS="quote">and to have a splitter work at auto-x speeds it'd need to be huge to generate enough downforce to matter unless your course designer likes to put in 60 mph sweepers into every course.</TD></TR></TABLE>

Actually a sweeper like that has made me thinking of some downforce. Several times I've visited American AutoX series and they design courses for muscle cars. Not everytime, but often enough you have to use your 3-rd gear.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accel &raquo;</TD></TR><TR><TD CLASS="quote">Thanks! I'll have to look at this.</TD></TR></TABLE>

there should be articles on the net about how splitters work, but basically you're using a horizontal plate to split the air into a high pressure and low pressure zone. the high pressure above the splitter creates downforce (P = F/A, ergo F = PA) meaning that the larger the area of the splitter, the higher the downforce (or, the higher the pressure, but that's harder to design for)